Google Fi Coverage
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Google Fi Coverage: No Google Fi Coverage Weak
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Google Fi Coverage Map

Google Fi runs over T-Mobile's network. Additional coverage may sometimes be available through T-Mobile's roaming partners, but its unclear exactly what roaming access Google Fi subscribers have access to. Roaming coverage is not shown in the map below.

Google Fi previously offered a unique (non-roaming) technology for switching between the networks offered by T-Mobile, Sprint, and US Cellular. Google Fi no longer uses that novel technology for network switching.

The map displays predicted outdoor signal quality. Indoor signal, congestion, and roaming coverage aren't mapped. Each can matter in practice.

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Data Sourcing

Cell coverage data for Google Fi comes primarily from the May 2026 release of the FCC's Broadband Data Collection program (representing networks as of December 2025), supplemented with real-world measurements from large crowdsourcing projects.